The need for superconducting magnets

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Table of contents

I. Introduction
I.1 Superconductivity
I.2 Superconductors (CICCs) and Fusion tokamaks
I.3 Coupling losses in superconductors: the case of the strand
I.4 Considerations on losses in superconducting magnets for fusion
I.5 Thesis content and objectives
II. Models
II.1 Presentation of the models
II.1.1 The MPAS model
II.1.2 Coupling Losses Algorithm for Superconducting Strands (CLASS)
II.1.3 One-stage COLISEUM
II.1.4 Two-stage COLISEUM
II.2 Applications of COLISEUM
II.2.1 Coupling between two stages: application of two-stage COLISEUM
II.2.2 Crosscheck of the one-stage COLISEUM and JackPot
II.2.3 Preliminary comments on the models
II.3 COLISEUM: Models overlap and cross-checks
II.3.1 CLASS vs one-stage COLISEUM
II.3.2 Reduction to a two time constant system for the two-stage COLISEUM
II.3.3 Two-stage COLISEUM vs one-stage COLISEUM
II.3.4 Global overlap: Application to a multiplets of Composite strands
III. Extension of the model
III.1 𝑛-stages COLISEUM iteration
III.1.1 First step
III.1.2 Numerical application
III.1.3 Iterative process
III.1.4 Numerical application
III.1.5 Discussion
IV. Experimental AC losses measurement
IV.1 The JOSEFA Facility
IV.1.1 Presentation of the facility
IV.1.2 Presentation of the method
IV.1.3 Short presentation of the test of the MAG42 conductor sample
IV.2 Hysteresis Losses
IV.3 Coupling Losses
IV.4 Experimental studies
IV.4.1 MAG 42 studies
IV.4.2 Complementary study: tomographic analysis
V Benchmark of the two models
V.1 COLISEUM application to experimental data
V.2 MPAS application to experimental data
V.2.1 Statistical study
V.2.2 Discussion and conclusion
V.3 Discussion between the two approaches
VI. Conclusions and Prospects
VI.1 Rationalization of MPAS
VI.2 Analytical extension of the model: 𝑛-stage COLISEUM
VI.3 Experimental coupling losses: JOSEFA facility
VI.4 Models benchmark on data
VI.5 Prospects
References